Skip to main content An error has occurred while loading the search interface. Please refresh the page. Data Portal Data Portal User account menu Sign in / Register Show/Hide Menu Toggle Main navigation What we do What we do We bring together eight activities required to deliver the plans, markets and operations of the energy system of today and the future. Bringing these activities together in one organisation encourages holistic thinking on the most cost-efficient and sustainable solutions to the needs of our customers. Back What we do View Strategic Planning The SEP team work in partnership with governments, Ofgem, industry and wider stakeholders to guide Great Britain on what infrastructure and sources of electricity are required to securely accelerate the transition away from fossil fuels into new energy technologies, including renewable energy. Security of Supply Security of Supply analyses where the energy we need over the short, medium and long-term will come from. In doing so it assesses a wide range of factors that could affect our supply of energy, enabling early actions and decisions to ensure we can meet future demand. Systems Operations From hospitals to households, telecoms to transportation, our society relies on electricity. Our control centre makes sure there is always a reliable and safe supply as we move megawatts around the country. Connections Explained We will deliver efficient system access for Generation and Demand projects, so that those projects that are first ready can be first served – delivering the energy system to meet net zero and facilitating economic growth by connecting new and existing industries. Whole Energy System Resilience Our energy system is complex, with an increasing number of interconnections. This means that disruption to one part can have implications for another. But this complexity also provides us with more options to mitigate problems. Energy Insights We will develop comprehensive and independent insights across the entire energy system, offering clear recommendations to policy makers, industry decision makers and leadership across our organisation on how to accelerate energy transition progress. Energy Markets Whether you’re interested in the innovation underway in the Markets team or are looking to brush up on market fundamentals, you’ve come to the right place. Data & AI NESO will bring together data from multiple sources in a way that enables the modern digitalised energy system needed for a low carbon, flexible and affordable future. Energy 101 Energy 101 We’re experts in all things energy – how much we use, where it comes from and how it moves around Great Britain. And we want to share all that knowledge with you. Back Energy 101 View Electricity Transmission Network Explainer NESO's Electricity Networks Explainer package offers a comprehensive view of GB’s electricity transmission network, including how it is changing and why this change is needed. Net zero explained Confused about carbon? Need knowledge on net zero? Interested in EVs? You’ve come to the right place. Great Britain’s Monthly Energy Stats Ever wonder how much gas and electricity we use in Great Britain? View our monthly insights into which generation sources provide Great Britain's electricity and learn how much we use each month. Electricity explained We're the experts in electricity – how much we use, where it comes from, and how it travels into homes and businesses. Understanding how much electricity we consume, and which devices are most power-hungry is no easy task. Hydrogen explained Hydrogen is a growing part of the energy system. As NESO, we have been building our hydrogen expertise during our journey to being NESO and we would love to share it with you. Gas explained Gas has been a part of Great Britain’s energy mix since the Victorian Era. At NESO, we have been supporting the UK Gas system for many years through our supply and demand forecasts. We are building our expertise in gas as we strategically plan the gas system of the future. Balancing the Grid - Interactive game To give you some insight into the world of balancing the grid, we’ve developed a game where you can attempt to keep the grid stable while facing some of the challenges our control room operatives experience daily. Industry information Industry information Are you a balancing provider looking to supply services to us, trying to find the latest Grid Code, or TNUoS charging guidance? Find all the information you need including our operational data, forecasts, and reports designed to help you make efficient decisions. Back Industry information View Balancing costs Balancing costs are those costs associated with (A) the Balancing Mechanism, (B) balancing services, and (C) energy trading. Balancing services We procure services to balance demand and supply and to ensure the security and quality of electricity supply across Britain's transmission system. Charging All users of the electricity transmission system pay to use it. This brief overview looks at who pays, for what, and how the charges are calculated. Codes Our team of code administrators oversees all aspects of the code modification processes and related meetings. So whether you’re new to the process, or experienced in the way it all works, we’ll help you get to the information you need. Connections In this section, we’ve got everything you need to understand the connections process. Including what you need to do to connect to, or make use of the National Electricity Transmission System (NETS). Connections Reform The UK’s energy system is undergoing a fundamental transformation. To achieve the government’s Clean Power 2030 ambition and support the transition to net zero, we must reform the way projects connect to the electricity network. Flexibility We believe that demand side flexibility has a key role to play in operating a fully decarbonised electricity system which is reliable, affordable and fair Market Monitoring Industry data and reports These pages contain data and support for users of the National Electricity Transmission System (NETS). Here you will find the latest operational data, forecasts, and reports. Network access planning Our Network Access Planning engineers are responsible for assessing, co-ordinating and sanctioning the planned release of assets from the National Electricity Transmission System. Reformed National Pricing Effective markets are key to delivering and operating the most efficient energy system, and it is critical that those markets are efficiently designed and implemented to deliver affordable, secure and clean energy System Access Reform News and events News and events All the latest news from the heart of Great Britain's electricity system. Find out how we balance the grid, how we’re innovating for the future, and who the people are that are working on Britain's energy system around the clock. Back News and events View Publications Publications We've got a wide range of publications offering energy insights and analysis. Download our reports and data to see the innovative ways we are transforming the future of Great Britain’s energy. Back Publications View View all of our publications Find a wide range of publications that provide energy insight and analysis right here, as well as information about how we're shaping the future of energy in Great Britain. Beyond 2030 The Beyond 2030 report builds on top of the Holistic Network Design and makes a set of network recommendations throughout the 2030s. Future Energy Scenarios (FES) Future Energy Scenarios (FES) represent a range of different, credible ways to decarbonise our energy system as we strive towards the 2050 target. Clean Power 2030 Achieving clean power by 2030 whilst keeping the system secure and affordable for consumers would be a world-leading achievement. Electricity Ten Year Statement (ETYS) The Electricity Ten Year Statement (ETYS) is our view of future transmission requirements and the capability of Great Britain’s National Electricity Transmission System (NETS) over the next 10 years. GB Reduced Model The GB Reduced Model is a simplified representation of the National Electricity Transmission System of Great Britain, developed using DIgSILENT PowerFactory. North Hyde Review NESO publishes its interim findings from the review into the North Hyde Substation outage which took place on 20 March and led to the closure of Heathrow Airport. Operability Strategy Report and Electricity Markets Roadmap We are developing new ways to balance electricity supply and demand and manage a low carbon electricity system, helping to meet net zero targets and minimise costs for consumers. DER/CER Visibility and Access Roadmap Great Britain’s energy landscape is transforming at pace as we move away from fossil fuels and towards low carbon sources of generation in our pursuit of a cleaner, more secure and affordable power system by 2030. Summer Outlook Summer Outlook reports are designed to inform the energy industry and support its preparations, we also outline Great Britain’s projected electricity needs for the summer ahead. Winter Watch The Winter Outlook Report presents our view of security of supply for the electricity systems for the winter ahead. Whole electricity system The journey to creating an energy system fit for the future wouldn’t be possible without close collaboration with industry partners to help the transition. System Operability Framework (SOF) The System Operability Framework (SOF) takes a holistic view of the changing energy landscape to assess the future operation of Britain's electricity networks. Regional Development Programmes RDPs look across the whole electricity system to unlock more network capacity, reduce constraints and open new revenue streams for market participants. Careers Careers Back Careers View About About We ensure that Great Britain has the essential energy it needs by making sure supply meets demand every second of every day. Back About View Strategic priorities As a new organisation we recognise our responsibility to deliver right from the start. The strategic priorities that we are driving towards can be found on this page. Our people We work with a whole range of experts, including engineers, academics and industry professionals so that we can safely deliver affordable and clean energy to customers. As we build a greener electricity system of the future our people know they are shaping the future for generations to come. A whole system challenge Operational information Want to know how we're regulated or how we're organised? Interested in our compliance statements and consultation responses? Our operational information page is where you can find all of this and more. European engagement NESO’s ongoing work with European political and industry stakeholders Innovation Innovation is critical to helping us meet the challenges of transitioning to a zero carbon future. As we sit at the very heart of the energy system, we play a central role in overcoming these challenges. Our progress towards net zero Read the story of how the we have decarbonised the electricity system to date, offering a blueprint to other countries around the world to help them reduce emissions. Our projects All of our projects contribute towards our effort to make the grid ready to operate with 100% zero carbon electricity by 2025. Show favourites Close Close tooltip Sign in or register to manage your favourites Sign in or register Help You are now signed in Visit My NESO account to view and manage your dataset subscriptions. Maybe later Go to your account Image Winter Watch Breadcrumb Home Publications Winter Watch Add to favourites Close tooltip Sign in to add this page to your favourites Sign in or register Electricity supply expected to remain secure this winter Great Britain is expected to have enough electricity this winter, with NESO’s early forecast showing a stronger margin than during the 2022 energy crisis. Our current view is that the electricity system will remain secure and reliable through winter 2026/27. We expect a surplus of 5.5GW between 31 October 2026 and 31 March 2027, with an 8.8% buffer over expected peak demand. The outlook is positive, but winter conditions can change. NESO will continue to monitor global gas markets, European electricity flows, weather conditions and periods where supply and demand may be more finely balanced, particularly in January. A fuller assessment will be published in the Winter Outlook later this year. What this means for households and businesses For households and businesses, the early view is reassuring: Great Britain is forecast to have enough electricity to meet demand this winter. Some periods may be more finely balanced, particularly in January, but NESO has established operational tools to manage tighter days and keep the system secure. How did we reach our position? NESO’s assessment is based on detailed modelling of around 30,000 scenarios across the winter period. These scenarios test a range of possible conditions, including demand, weather, renewable generation, power station availability and interconnector performance. This modelling helps NESO understand where the system is resilient and where it may need more active management. What NESO is watching The overall outlook is positive, but winter readiness depends on actively managing a changing energy environment. NESO will continue to monitor: Global gas market pressures. European electricity flows and interconnector performance. Cold, still weather periods that can affect demand and renewable generation. Tighter periods most likely in January. Real-time system conditions through winter. Gas and electricity working together Winter resilience depends on the electricity and gas systems working closely together. Gas continues to play an important role in supporting electricity generation, particularly during periods of high demand or lower renewable output. NESO works with National Gas and European system operators to understand risks, coordinate planning and support secure operation across the wider energy system. Debs Petterson, Director of Whole System Energy Resilience at NESO, and Glenn Bryn Jacobsen, Director of Energy Systems and Resilience at National Gas, explain what sits behind winter readiness and how the electricity and gas systems work together in practice. Access the joint Q&A Access the report Download the Early View of Winter Outlook 2026-27 Report Download Winter Review and Consultation Download Winter Review 2025-26 Data Workbook Key terms: De‑rated margin: The expected spare electricity available over winter, adjusted to reflect how reliably different types of generation are likely to be available. Operational surplus: A day‑to‑day view of spare electricity, showing when tighter days could happen. LOLE (risk measure): A risk measure that helps assess how often supply could fall short. This is normally managed through operational actions without affecting customers. Interconnectors: Links to other countries that let us import or export electricity when needed. National Gas Winter Outlook NESO only assesses requirements on the electricity network. Find more information about the gas network on the National Gas website. Winter Operations Here you can view all past Winter Outlook reports and all policy documentation relating to Winter Operations. Future of Energy updates Subscribe to our mailing list and we'll let you know as soon as we publish any of our future of energy documents. Footer About NESO Who we are Operational information Careers Applications, portals and APIs Contact us How to report a power cut Help centre Media centre Corporate information Suppliers Freedom of Information and Environmental Information Regulations Modern Slavery Statement Public Sector Equality Duty (PSED) Site Accessibility Privacy notice Cookie policy Terms and Conditions Security Responsible Disclosure Social Twitter LinkedIn YouTube logo--facebook